ExxonMobil has a 3.2% yield, but what if you could jack that up to 26%? That's the pitch from YieldMax XOM Option Income Strategy ETF. Be cautious.One of ExxonMobil's (XOM 0.87%) defining features is its dividend -- specifically, the company's ability to increase the dividend year in and year out for 42 consecutive years despite the inherent volatility of the energy sector. But for some investors, the 3.2% dividend yield might not be compelling enough to make the integrated energy giant a buy.Selling covere ...